Fluid-meter.



e. M. WALPO LE. FLUID METER. APPLBCATION man AUG 3. M4.

Patented J 111- 13, 1915.

Z 2 7 w W% M@ m 3% J .a m M 00 M 5 v t h a. 1 a W .mFm I w/w w l Z 1 w a BENJJUHIN EVALPOLE, PROVIDENCE,

"v. r i Flew *VWTWWN'W 4% RHODE ISLAND, ASEIGNUR TU BUILDERS IRON FOUNDRY, OE" PROVIDENCE, ISLANB, 1. COIEZ-FULRATIQN -31? BHQDE lemme.

FLUIDJVZETEE.

Appiieation filefi August 3.

F0 111 207mm it may concern;

Be it known that I, BENJAMIN M. YVAL- row. a citizen of the [Qhiiied States, and resident of the city of Providence, in the county of Providence and Siate of Rhode Isiunc have invented certain new and usefui Improvements in? iuid-iilefers, of which the following is a. SPQCfiCfit'LOIl.

This invention relates so fluid meters of "1 who 7 1) 1 (*1 J1 r. we miles pun 1'. rd urtn .1 1.2m. or \)V W. biting device operated dzfierenees in #sures caused by the How hrough the imam. The differences in the pressures nee rhi'eciiy proportional to the how, and 1:;

is much more diiiieult to eonstruet a. Z'HGiJQl which will give nceur: results when the iiou' is small then when it is great. since the difi'erences in pressure so small that it (iiiiieult to cause a suiii-cientiy large movement of the operative parts of the meter by means of these pressures.

' The speciai object of my presenijimproreineut to obtain an inward movement of the operating parts at the beginning, oi the no tion of the (iiflQIQlltiill pressures over the nieehnniem shown in the eel-pending patent nppiientior. Serizii N umber $5,937.

Yvith these and other objects in vioug the inve. on consists of certain novel features of eonsbruetii'in, as will be more fully described and particularly pointed out in the nppeuahxi cluiuis.

In the accompanying riruwiugt Figure 1-- is :1. side eievneiou partly in section showing one form of operating mechanism, the two chambers being in section and Corr neetefi to n Venturi tube shown on. a relatively snmil scale. Fig. 2- iZs e Sectional end elevation of ti e mechniii'in shown in Fig. 1. Fig. 3 is :1 rear m v of the casing showing" one form of indicating, integrating and recording mechanism. Fig. 4. is e detuii showing the yoke connecting the piston with the penduhun arms.

Referring: to the drawings 1 and designzite 'mvo water tight chambers or comparemeuts. As herein represented eoznpurrnient 1 is eonueeted by pipe 23 Lo the hirger section or up- #reniu portion of a. Veniuri tube at J 5, andeoiupnrtment '12 by {ripe i to the e0nbeen poi-tioni'i of th venturi tube, and y means of the pipes the (JUniPLll'ilillk .Yiii be iilh ii with she \Yflilfii 0) Que fin" through the main oi which ehe enuz. ,1 rubeforms :1. part. As is well humvn, when water Specification of Letters Patent.

"penduhuns 10 support 1 Patented Jury 191 Serial Ho. 854,627.

or gas flows through the Veniuri tube- (Th6 pressure at the contracted portion becmnes less than that in the other portion m" the nnin, and eonsemietniziy in rho errn merit illustrated the pressure in eompni ineiri i5 also becomes iess ih um. in compel-tnieui; l. The Venuri tube is, hmvever. 'ouiy of the several Well known means. of ob ing (iifiei'a-rnce in p essures, and invention is not there? :1 'ieniuri tube.

Between :nupnrtment pipe or or ii i' op he ifviiuiier 3 a p :uovemeui. in The eyiiniii of differences in pressure pzu'tinents. Attached to th take oi? its motion emi Wardiy into (fOIDPZIltlUiYIiT 2. 9. Suspemied in compel-hum on km 1 (Fig. 2), resting upon the sugw'iri'jiii 12, (see partieuiariy 2}. he the penriuhuns exfenri above their 1'. points of support and each hae'pivotec; there to at 1% n horizontal .iiuh' Ti. the free ems of these links over-lap and at 15 are oivoteci. together and to the link and this knit-e2. huh is in turn pivoi ed i v H 17 to he p on rod 9. .i prefer to use the "two penciu ne ieuie oi the cum} iii .1 inched to the outer end 0i this shu arm. 24 which nmvcnrrv r end. This pen is arranged to be movei the surface of the remrihug dish 26, e}

d, In. this figure Hie opposite en-ri 1' i i arm is; shown as being provided. with th pointer .24 adapted to be moved across iiie iixeii phit'e 25:1 reserve or heating; the rate of :t t itinur of observation" em irwi to ehow m3 u; same 12 3: be uiouiuh ime of a graduated as an indicator ii How in the pipe 7 a.

ii: an iuieg'rziio; the otizi of His: 1.

ed on the frame 29 and connected to the arm 21- by the link 30. This frame is preferably supported on a knife edge 33 at its lower end, providing an inverted pendulum which may carry the weight or" the counter mechanism 31 across the face of the usual driving disk 32. As this exhibitor mechanism is shown and described in Patent No. 920,025 "further description is deemed unnecessary.

The operation of my device is as foilowsi llhen the liquid or gas first begins to How through the Venturi tube there is only a very slight difference in the pressures and, as these are transmitted through pipes 3 and t to the compartments 1 and 2, respectively it is difiicult to obtain any such movement of the piston as would serve to accurately indicate the flow or operate any exhibitor mechanism, unless the resistance to that movement is ll. the low increases, the ditferences in pro increase that there is then no such difiici. ty. It will be seen that the iTWO links 3.3, pivoted together at 15 and each pivoted. at hi to its pendulum, as they are arranged, otter very slight resistance the first downward movement of the piston, since they tend to only slightly disturb the equilihriiun of the pcndulums, and a suiticient movement for the practical operation. of the meter can be thus obtamed with :2

small flow its attendant slight difference. in pressures. As the flow increases and the accolnpiinying differences in pressures also increase, the penduluins ofier greater and greater resistance, and thus tend to make the movement 01" the piston uniform.

If it is desired to only obtain some visual indication of the flow through the main, it can be readily done by a rod or'similar-do vice attached to the piston and extending outside oi the compartment 1. Where rec ord is desired it can be'obtuined by a pen, such as 25, moved by the piston, but owing to the fact already referred to that the flow is not directly proportional to the differences in pressures, some further correction will ordinarily be required. its is well known this correctii'in can he binds in the spacing of the rulings upon the dial, but itis ire-- quently desirab e to have the rulings uniform or to oper con 'ter mechanism, and in such cases some cert ting mechanism, the cam. 18, properly on. interposed between the piston and. the pen or disk. in thc'device illustrated in the drawings it is to be understood t rat the dish 2t: is rotated by clock work in the usual manner.

The pendulums are only one form of resistance which may be used. But whatever form is used, it is essential to this invention that the connection between it and the piston or other device. movable by the diiier ences of pressures, (all included in the claims under the piston), shall be for the purpose, isv

such that the small initial diiii'erences when the flow in the main be'gins will be permitted to eil'ect a considerable movement in the movable device or member Without meeting with much resistive force. As shown in the drawings and herein described this is accomplished by so arranging the parts that the connecting links 13 are plvotallv connected to the resistance and will be at as nearly right angles to the line of travel of the 115- sist the movement of the piston, and links movnbly connected to the piston and resisting; means, said links being at substantially right angles to the travel of the piston when in no-fiow position.

2. In ameterto be operated by diflten" ences of pressures caused by :1 flow through it main, the combination of a piston movable by the ditterences of pressures, a pendulum arranged to resist the movement of the piston, and a link pivotally connected to the piston and the pendulum, said link being at substantially right angles to the travel of the piston when in no-fiovv position.

3. In a meter to be operated by differences of pressures caused by a flow through amain, the combination of a piston movable by the diil'erences of pressures, pendulums arranged to resist the movement of the piston, and links movably connected to the piston and the p'endulums, said links being at substantinlly right angles to the travel of the piston when in no flow position.

4. In a meter to be operated by differences of pressureicaused by e flow through a main,

the combination of n piston movable'by the 116 ditlerences of pressures, means for resisting the motion of the piston, and s connection between the piston and the resistance, said COHIIECUOIL being at substantially a right a'ugle to the travel of said piston and so con- 11! nected to the resistance that the first movement of the piston will produce little resistant force.

5. In a meter to'be operated by ditlercnces oi pressures caused by flow through a. 121

main, the combination of a piston movable by the differences of pressures, a pivoted 1cver urrung'ed to resist the movement of said piston, a link ol'ieratively connected to the piston and resisting means at substantially a 121 right angle to the travel of said piston when in no flow position, and exhibiting; means opcruted by the said piston.

in :1 meter to be opera ted by diiferences of" pressures caused by s ilow through a 13 main, 5 pisten actuated by the difi'erences of pressures, apendulum' for reslsting the momment of said piston the same being alrmnged t9 hzmg normally m a verticel posltion, a hnk plvotally connected to sand piston aid {to said pendulum at a right angle to both pisten and pendulum when the mechanism 1s 111 no flow posltlon whereby the firm, mevement of the pisten will-protiuce the leash in presence 01 two Witnesses.

BEI JAIVHN M. WAlJULE 116351 11?!) BARLOW,

lfiimnmny, 

